Military observation balloons (captive and free) a complete treatise on their manufacture, equipment, inspection, and handling, with special instructions for the training of a field balloon company
- publisher: New York, D. Van Nostrand company
- creator: Widmer, Emil Joseph, 1889-
- Keyword: Balloons. Aerial observation (Military science).
- years: 1917.
- pages: vii, 151 p.
- class: U640
- notes: "Based on the balloon manual of the German army." - Publisher's note.
- download: pdf file
